We study the market for applications on Facebook, the dominant platform for social networking and make use of a rule change by Facebook by which high-quality applications were rewarded with further opportunities to engage users. We find that the change led to quality being a more important...

Online copyright enforcement, in the form of either direct action against the supply-side (via website shutdowns) or the demand-side (via individual lawsuits against users), has not been very effective in reducing piracy. Regulators have therefore put forward the so called "follow the money"...

Platforms operators act as private regulators to increase usage and maximize profits. Their goals depend on the development of the platform: overcoming the chicken-egg problem early on requires attracting platform participants while quality becomes more important later on. Private regulators...

Peer influence through word-of-mouth (WOM) plays an important role in many information systems but identification of causal effects is challenging. We identify causal WOM effects in the empirical setting of game adoption in a social network for gamers by exploiting differences in individuals’...

Peer influence through word-of-mouth (WOM) plays an important role in many information systems but identification of causal effects is challenging. We identify causal WOM effects in the empirical setting of game adoption in a social network for gamers by exploiting differences in individuals'...

We study the market for apps on Facebook, the dominant social networking platform, and make use of a rule change by Facebook by which highly engaging apps were rewarded with further opportunities to engage users. The rule change led to new applications with significantly higher user ratings...

Oft wird unterstellt, dass die intensive Nutzung des Internets die Menschen in der realen Welt zu kontaktarmen Sonderlingen macht. Auf Vertrauen basierende Kontakte erleichtern aber in vielerlei Hinsicht den Austausch zwischen Individuen und haben daher greifbare ökonomische Konsequenzen. Ein...

Does the Internet undermine social capital or facilitate inter-personal and civic engagement in the real world? Merging unique telecommunication data with geo-coded German individual-level data, we investigate how broadband Internet affects several dimensions of social capital. One...